1. 环境准备:
① JDK 1.7以上
② Maven工程(引入Maven工程包)
③ 开发工具(IDEA/Eclipse)
2. 代码示例:
import org.joda.time.*; import org.joda.time.format.DateTimeFormat; import org.joda.time.format.DateTimeFormatter; import java.util.*; /** * 基于JDK13,联合Joda-Time类的时间工具类
* Joda 是一种令人惊奇的高效工具。无论您是计算日期、打印日期,或是解析日期,Joda都将是工具箱中的便捷工具
* 1.引入joda-time的jar包 * 2.官方学习网址:https://www.joda.org/joda-time/ * 3.Maven引入示例如下: ** ======================== *@author Administrator */ public class DateUtil { public static final String YMDHMS = "yyyy-MM-dd HH:mm:ss"; public static final String YMDHMS_CN = "yyyy年MM月dd日 HH时:mm分:ss秒"; public static final String YMD = "yyyy-MM-dd"; public static final String YMD_CN = "yyyy年MM月dd日"; public static final String HMS = "HH:mm:ss"; public static final String HMS_CN = "HH时mm分ss秒"; public static final String MdyhmsSA = "MM/dd/yyyy hh:mm:ss.SSSa"; // 09/06/2009 02:30:00.000PM public static final String dMyHms = "dd-MM-yyyy HH:mm:ss"; // 06-Sep-2009 14:30:00 public static final String EdMyHmsA = "EEEE dd MMMM, yyyy HH:mm:ssa";// Sunday 06 September, 2009 14:30:00PM public static final String MdyHmZZ = "MM/dd/yyyy HH:mm ZZZZ"; // 09/06/2009 14:30 America/Chicago public static final String MdyHmZ = "MM/dd/yyyy HH:mm Z"; // 09/06/2009 14:30 -0500 public static final String DAY = "day", WEEK = "week", MONTH = "month", YEAR = "year"; public static final String HOUR = "hour", MINUTE = "minute", SECOND = "second"; /** * 日期 → 字符 * * @param date 日期 * @param pattern 格式(例如 ”yyyy-MM-dd HH:mm:ss“) * @return 数据的格式为:yyyy-MM-dd HH:mm:ss */ public static String getDateTimeStr(Date date, String pattern) { DateTime dateTime = new DateTime(date); return dateTime.toString(pattern); } public static String getDateTimeStrLocale(Date date, String pattern) { DateTime dateTime = new DateTime(date); return dateTime.toString(pattern, Locale.CHINA); } public static Date getDateTime(String dateTimeStr, String pattern) { DateTimeFormatter dtf = DateTimeFormat.forPattern(pattern); DateTime dateTime = new DateTime(dateTimeStr).toDateTime(); return dateTime.toDate(); } /** * 时间加减运算 * * @param datetime joda-time时间类 * @param period 周期(年月日时分秒周) * @param count 偏移量 * @return 时间字符串(格式:yyyy-MM-dd HH:mm:ss) */ public static String getDateTime(DateTime datetime, String period, int count) { DateTime result = new DateTime(); switch (period) { case DAY: result = datetime.plusDays(count); break; case MONTH: result = datetime.plusMonths(count); break; case YEAR: result = datetime.plusYears(count); break; case WEEK: result = datetime.plusWeeks(count); break; case HOUR: result = datetime.plusHours(count); break; case MINUTE: result = datetime.plusMinutes(count); break; case SECOND: result = datetime.plusSeconds(count); break; default: break; } return result.toString(YMDHMS, Locale.CHINA); } /** * 重置当前时间(如果有非法值输入则自动默认为日期元素的起始值) * * @param year 年份(1900~9999) * @param month 月份(1~12) * @param day 日(如果是2月,平年最大为28日,闰年最大为29日) * @param hour 小时(0~23) * @param minute 分钟(0~59) * @param second 秒钟(0~59) * @return */ public static DateTime setCurrDateTime(int year, int month, int day, int hour, int minute, int second) { year = String.valueOf(year).length() <= 9999 && String.valueOf(year).length() >= 1900 ? year : new DateTime().getYear(); month = month >= 1 && month <= 12 ? month : 1; List* * ======================== * * *joda-time *joda-time *2.10.5 *monthHas31 = Arrays.asList(1, 3, 5, 7, 8, 10, 12); if (month == 2) { // flag(true:平年,false:闰年) boolean flag = (year % 4 != 0 || year % 100 == 0 && year % 400 != 0); day = day >= 1 && day <= (flag ? 28 : 29) ? day : 1; } else { day = day >= 1 && day <= (monthHas31.contains(month) ? 31 : 30) ? day : 1; } hour = (hour >= 0 && hour <= 23) ? hour : 0; minute = (minute >= 0 && minute <= 59) ? minute : 0; second = (second >= 0 && second <= 59) ? second : 0; DateTime dateTime = DateTime.now().withYear(year).withMonthOfYear(month).withDayOfMonth(day) .withHourOfDay(hour).withMinuteOfHour(minute).withSecondOfMinute(second); return dateTime; } /** * d1 是否在 d2 之前? true 是的,false 不是 * * @param d1 第一个时间 * @param d2 第二个时间 * @return true/false */ public static boolean compare(DateTime d1, DateTime d2) { if (d1.isBefore(d2)) { return true; } return false; } /** * 根据周期计算两个时间的偏移量 * * @param d1 第一个时间 * @param d2 第二个时间 * @param period 周期(年月日时分秒周) * @return */ public static int calRange(DateTime d1, DateTime d2, String period) { int result = 0; if (DAY.equals(period)) { result = Days.daysBetween(d1, d2).getDays(); } else if (MONTH.equals(period)) { result = Months.monthsBetween(d1, d2).getMonths(); } else if (YEAR.equals(period)) { result = Years.yearsBetween(d1, d2).getYears(); } else if (HOUR.equals(period)) { result = Hours.hoursBetween(d1, d2).getHours(); } else if (MINUTE.equals(period)) { result = Minutes.minutesBetween(d1, d2).getMinutes(); } else if (SECOND.equals(period)) { result = Seconds.secondsBetween(d1, d2).getSeconds(); } else if (WEEK.equals(period)) { result = Weeks.weeksBetween(d1, d2).getWeeks(); } else { return result; } return Math.abs(result); } /** * 获取指定日期的所在周期的最后日期或第一个日期(返回格式:yyyy-MM-dd HH:mm:ss)
* 例如: 指定日期为:”2020-02-20“,周期为:”day“, isMax为true; 返回结果为:”2020-02-29“ * * @param dateTime joda-time 指定日期 * @param period 周期(年月日时周) * @param isMax true:最大日期,false:最小日期 * @return */ public static DateTime getStartOrEnd(DateTime dateTime, String period, boolean isMax) { DateTime d = new DateTime(); if (YEAR.equals(period)) { d = isMax ? dateTime.dayOfYear().withMaximumValue() : dateTime.dayOfYear().withMinimumValue(); } else if (MONTH.equals(period)) { d = isMax ? dateTime.dayOfMonth().withMaximumValue() : dateTime.dayOfMonth().withMinimumValue(); } else if (WEEK.equals(period)) { d = isMax ? dateTime.dayOfWeek().withMaximumValue() : dateTime.dayOfWeek().withMinimumValue(); } else if (HOUR.equals(period)) { d = isMax ? dateTime.hourOfDay().withMaximumValue() : dateTime.hourOfDay().withMinimumValue(); } d = isMax ? d.withHourOfDay(23).withMinuteOfHour(59).withSecondOfMinute(59) : d.withHourOfDay(0).withMinuteOfHour(0).withSecondOfMinute(0); return d; } /** * 获取指定日期的所在周期的起止时间 * * @param dateTime 日期(Joda-Time) * @param period 周期(年月周) * @return ”yyyy-MM-dd,yyyy-MM-dd“ */ public static String getStartAndEndByPeriod(DateTime dateTime, String period) { DateTime d = new DateTime(); String start = "", end = ""; if (YEAR.equals(period)) { start = dateTime.dayOfYear().withMinimumValue().toString(YMD); end = dateTime.dayOfYear().withMaximumValue().toString(YMD); } else if (MONTH.equals(period)) { start = dateTime.dayOfMonth().withMinimumValue().toString(YMD); end = dateTime.dayOfMonth().withMaximumValue().toString(YMD); } else if (WEEK.equals(period)) { start = dateTime.dayOfWeek().withMinimumValue().toString(YMD); end = dateTime.dayOfWeek().withMaximumValue().toString(YMD); } else { // TODO 季度 } return start.concat(",").concat(end); } /*** * String → Date(JDK) * * @param dateTimeStr 需要转化的string类型的字符串 * @param pattern 转化规则 * @return 返回转化后的Date类型的时间 */ public static Date strToDate(String dateTimeStr, String pattern) { DateTimeFormatter dateTimeFormatter = DateTimeFormat.forPattern(pattern); DateTime dateTime = dateTimeFormatter.parseDateTime(dateTimeStr); return dateTime.toDate(); } /** * String → DateTime(JodaTime) * * @param dateTimeStr 日期字符串(格式最低要求:yyyy-MM-dd) * @param pattern 转化规则 * @return */ public static DateTime strToDateTime(String dateTimeStr, String pattern) { DateTimeFormatter dateTimeFormatter = DateTimeFormat.forPattern(pattern); DateTime dateTime = dateTimeFormatter.parseDateTime(dateTimeStr); return dateTime; } /** * 计算:两个时间相距天数 * * @param d1 时间1 DateTime:joda-time * @param d2 时间2 DateTime:joda-time * @return 偏移数 */ public static int getDays(DateTime d1, DateTime d2) { Period p = new Period(d1, d2, PeriodType.days()); return Math.abs(p.getDays()); } /** * 计算两时间相隔多少周期 * * @param dateTimeStr1 (格式为: yyyy-MM-dd HH:mm:ss) * @param dateTimeStr2 (格式为: yyyy-MM-dd HH:mm:ss) * @param pattern 转化规则 * @param period 周期(年月日周时分秒: year,month,day,week,hour,minute,second) * @return */ public static int getPeriods(String dateTimeStr1, String dateTimeStr2, String pattern, String period) { int num = 0; if (dateTimeStr1 == null || dateTimeStr1.isBlank() || dateTimeStr2 == null || dateTimeStr2.isBlank()) { return num; } DateTime d1 = DateTimeFormat.forPattern(pattern).parseDateTime(dateTimeStr1); DateTime d2 = DateTimeFormat.forPattern(pattern).parseDateTime(dateTimeStr2); // 默认 计算相隔天数 PeriodType periodType = PeriodType.days(); if (DAY.equals(period)) { num = new Period(d1, d2, periodType).getDays(); } else if (MONTH.equals(period)) { periodType = PeriodType.months(); num = new Period(d1, d2, periodType).getMonths(); } else if (WEEK.equals(period)) { periodType = PeriodType.weeks(); num = new Period(d1, d2, periodType).getWeeks(); } else if (YEAR.equals(period)) { periodType = PeriodType.years(); num = new Period(d1, d2, periodType).getYears(); } else if (HOUR.equals(period)) { periodType = PeriodType.hours(); num = new Period(d1, d2, periodType).getHours(); } else if (MINUTE.equals(period)) { periodType = PeriodType.minutes(); num = new Period(d1, d2, periodType).getMinutes(); } else if (SECOND.equals(period)) { periodType = PeriodType.seconds(); num = new Period(d1, d2, periodType).getSeconds(); } return Math.abs(num); } /** * 判断时间是否在指定区间内 * * @param start 开始时间 * @param end 结束时间 * @param aimDateTime 被判断的时间 * @return true:是,false:否 */ public static boolean isExist(DateTime start, DateTime end, String aimDateTime) { Interval interval = new Interval(start, end); boolean flag = interval.contains(new DateTime(strToDateTime(aimDateTime, YMDHMS))); return flag; } /** * 判断指定日期是否在当前时间之后 */ public static boolean isAfterNow(DateTime dateTime) { return dateTime.isAfterNow(); } /** * 判断指定日期是否在当前时间之前 */ public static boolean isBeforeNow(DateTime dateTime) { return dateTime.isBeforeNow(); } /** * 得到指定日期为星期几 * * @param dateTime 指定日期(Joda-time) * @return 中文星期几 */ public static String getWeekDay(DateTime dateTime) { String result = null; if (DateTimeConstants.SUNDAY == dateTime.getDayOfWeek()) { result = "星期日"; } else if (DateTimeConstants.SATURDAY == dateTime.getDayOfWeek()) { result = "星期六"; } else if (DateTimeConstants.FRIDAY == dateTime.getDayOfWeek()) { result = "星期五"; } else if (DateTimeConstants.THURSDAY == dateTime.getDayOfWeek()) { result = "星期四"; } else if (DateTimeConstants.WEDNESDAY == dateTime.getDayOfWeek()) { result = "星期三"; } else if (DateTimeConstants.TUESDAY == dateTime.getDayOfWeek()) { result = "星期二"; } else if (DateTimeConstants.MONDAY == dateTime.getDayOfWeek()) { result = "星期一"; } return result; } /** * JDK实现:判断指定日期所在的季度
** 1 第一季度 (一月,二月,三月) * 2 第二季度 (四月,五月,六月) * 3 第三季度 (七月,八月,九月) * 4 第四季度 (十月,十一月,十二月) * *@param date 指定JDK的日期 * @return 1:第一季度,2:第二季度,3:第三季度,4:第四季度 (如果返回0,请检查输入参数) */ public static int getSeason(Date date) { if (date == null) { return 0; } Calendar c = Calendar.getInstance(); c.setTime(date); int month = c.get(Calendar.MONTH), season = 0; if (month == Calendar.JANUARY || month == Calendar.FEBRUARY || month == Calendar.MARCH) { season = 1; } else if (month == Calendar.APRIL || month == Calendar.MAY || month == Calendar.JUNE) { season = 2; } else if (month == Calendar.JULY || month == Calendar.AUGUST || month == Calendar.SEPTEMBER) { season = 3; } else if (month == Calendar.OCTOBER || month == Calendar.NOVEMBER || month == Calendar.DECEMBER) { season = 4; } return season; } /** * 取得季度月 * * @param date 指定日期 * @return 日期数组 */ public static Date[] getSeasonDate(Date date) { Date[] season = new Date[3]; if (date == null) { return season; } Calendar c = Calendar.getInstance(); c.setTime(date); int nSeason = getSeason(date); if (nSeason == 1) { // 第一季度 c.set(Calendar.MONTH, Calendar.JANUARY); season[0] = c.getTime(); c.set(Calendar.MONTH, Calendar.FEBRUARY); season[1] = c.getTime(); c.set(Calendar.MONTH, Calendar.MARCH); season[2] = c.getTime(); } else if (nSeason == 2) { // 第二季度 c.set(Calendar.MONTH, Calendar.APRIL); season[0] = c.getTime(); c.set(Calendar.MONTH, Calendar.MAY); season[1] = c.getTime(); c.set(Calendar.MONTH, Calendar.JUNE); season[2] = c.getTime(); } else if (nSeason == 3) { // 第三季度 c.set(Calendar.MONTH, Calendar.JULY); season[0] = c.getTime(); c.set(Calendar.MONTH, Calendar.AUGUST); season[1] = c.getTime(); c.set(Calendar.MONTH, Calendar.SEPTEMBER); season[2] = c.getTime(); } else if (nSeason == 4) { // 第四季度 c.set(Calendar.MONTH, Calendar.OCTOBER); season[0] = c.getTime(); c.set(Calendar.MONTH, Calendar.NOVEMBER); season[1] = c.getTime(); c.set(Calendar.MONTH, Calendar.DECEMBER); season[2] = c.getTime(); } return season; } /** * 计算当指定日期距离所在日期的第几天
* 例如:当前日期为 2020-04-01,四月一日是第二季度的一天,传入的日期为2020-04-02;则输出的结果为:1 (即:已经相隔一天了) * * @param datetime 指定日期 * @return num==0 可能1.传入参数为null,2.传入的日期为当前季度所在的第一天 */ public static int calDuringSeasonDays(DateTime datetime) { if (datetime == null) { return 0; } int month = datetime.getMonthOfYear(); DateTime startTime = null; if (month == 1 || month == 2 || month == 3) { startTime = datetime.withMonthOfYear(1).dayOfMonth().withMinimumValue(); } else if (month == 4 || month == 5 || month == 6) { startTime = datetime.withMonthOfYear(4).dayOfMonth().withMinimumValue(); } else if (month == 7 || month == 8 || month == 9) { startTime = datetime.withMonthOfYear(7).dayOfMonth().withMinimumValue(); } else if (month == 10 || month == 11 || month == 12) { startTime = datetime.withMonthOfYear(10).dayOfMonth().withMinimumValue(); } return Math.abs(Days.daysBetween(startTime, datetime).getDays()); } public static void main(String[] args) { // JDK 得到当前时间 Date date = new Date(); // JodaTime 得到当前时间 Date dateNow = DateTime.now().toDate(); // 创建日期的方式一:(以此为:年月日时分秒毫秒) DateTime dateTime = new DateTime(2020, 4, 2, 0, 0, 0, 0); String dateTimeStr = "2021-01-02 20:20:20", dateTimeStr2 = "2020-02-12 23:20:20"; DateTime nextFirstDay = new DateTime().dayOfYear().withMinimumValue(); DateTime nextLastDay = new DateTime().dayOfYear().withMaximumValue(); System.out.println(calDuringSeasonDays(dateTime)); // System.out.println(Arrays.asList(getSeasonDate(dateNow))); // System.out.printf("当前日期所在的季度为:%s\n", getSeason(new Date())); // System.out.printf("JDK获取当前日期时间戳推荐System.currentTimeMillis:%s\n", System.currentTimeMillis()); // System.out.println("jodaTime得到当前时间戳(建议):" + DateTimeUtils.currentTimeMillis()); // System.out.println("JDK得到当前时间戳1(建议):" + System.currentTimeMillis()); // System.out.println("JDK得到当前时间戳2:" + "new Date().getTime() 这种方式已经不推荐使用!"); // System.out.println(getWeekDay(DateTime.now())); // System.out.println(getStartAndEndByPeriod(new DateTime(date), YEAR)); // System.out.println(dateTime.toString()); // System.out.println(isExist(nextFirstDay, nextLastDay, dateTimeStr)); // System.out.println(getPeriods(dateTimeStr, dateTimeStr2, YMDHMS, MINUTE)); // System.out.println(strToDate(dateTimeStr, YMDHMS)); // System.out.println(strToDateTime(dateTimeStr, YMDHMS)); // System.out.println(getDays(nextLastDay, nextFirstDay)); // System.out.println(getStartOrEnd(new DateTime(date), YEAR, true).toString(YMDHMS)); // System.out.println(calRange(nextLastDay, nextFirstDay, SECOND)); // System.out.println(setCurrDateTime(220, 21, 33, 23, 59, 59).toString(YMDHMS)); // System.out.println(new DateTime().getYear()); // System.out.println(DateTime.now().toString(YMDHMS, Locale.CHINA)); // System.out.println(getDateTime(new DateTime(date), DAY, -3)); // System.out.println(getDateTime(dateTimeStr, YMDHMS)); // System.out.println(getDateTimeStr(date, YMDHMS_CN)); // System.out.println(getDateTimeStrLocale(date, YMD_CN)); // System.out.println(new DateTime(date)); // 输出:2020-04-04T21:33:11.625+08:00 } }